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244 B.A.N.Z. ANTARCTIC RESEARCH EXPEDITIOS<br />
The algae are quite abnormal for Buetlia but the apothecial characters are closer to Buellia<br />
than to any genus known to me in the Trentepoh!k series of families.<br />
On rock with Pyrenudesmiam subpyracea.<br />
Macquarie Island, Featherbed Flat, R.A.N.Z.A.R.E. B533-8.<br />
Ascospores 4-celled to few-celled muriform . . . . . . . . . . Sect. DIPLO~MMA<br />
Cortex of intricate hyphae; ascospores 26-22 (-26) X 8-9 (-12)r. .. B. amisomera<br />
Cortex fastigiate but not capitate-fastigiate<br />
Ascospores 20-30 X 8-15r.; thallus white, verrucose to granulose<br />
K reddening, thallus 1 mm. thick . . . . . . . . . . B. grmzdosa<br />
K-, thallus 200-25OP thick . . . . . . . . . . B. Qoudkri<br />
Ascospores 15-26 X 4-5r. ; thallus white to brownish, crustose to granulose . . B. Siplei<br />
Ascospores 16-26 X 7-lor. ; thallus usually somewhat yellowish<br />
Marginal hypothallus broad; thal!us yellow, K-; apothecia 0.44.7 mm. in dia-<br />
meter . . . . . . . . . . . . . . . . . . B. Nelsoni<br />
Hypothallus absent, at least not extending beyond the margin of the assimilative<br />
areoles<br />
Apothecia 0.5-0.6 mm. in diameter, thecinm 100-11OP tall; thallus rather cit-<br />
rine, 300-1,00OP thick . . . . . . . . . . . . B. citrella<br />
Apothecia 0.7-1-0 mm. in diameter, thecium 120-140~ tall<br />
Thallus cream colour, 50OP thick . . . . . . . . B. cremea<br />
Thallus paler, 2 mm. thick . . . . . . . . . . v. incrassata<br />
Ascospores 2-celled<br />
Thallus effignrate . . . . . . . . . . . . . . . . Sect. D~PLOICIA<br />
Thallus yellow rufescent; spores 11-16 X 6-gP . . . . B. Huei (L. radians Hue)<br />
Thallus white to pale ashy; ascpspores 13-16 X 7-7-5r. .. . . B. actinobola<br />
Thallus white glaucescent, snbsquamulose; apothecia with evanescent thalline margin<br />
may belong in Rinodina) . . . . .. B.Bdingtmii(awtralissima)<br />
Thallus not effigurate . . , . . . . . . . . . . . Sect. EUBUELLIA<br />
Ascospores polari-bilocular, very clearly so when young, less distinctly so when old<br />
Thecium 50-55~ tall, ascospores 16-20 X 5.5-7p; cortex nearly absent B. Rzlssellii<br />
Thecium 140~ tall, ascospores 14-20 X 7-12~; cortex capitate-fastigiate B. perlala<br />
Ascospores not polari-bilocular.<br />
Hypothallus absent, at least not extending beyond the assimilative areoles<br />
Cortex intricate or lacking over the top of the areole<br />
Ascospores 9-13 X 5-6.fjr, thecium 50-6OP tall<br />
Parathecium not well differentiated . . . . . . B. paUida<br />
Parathecium 3OP on sides, 40-5OP thick below . . B. Johnstmi<br />
Ascospores 15 x 7r., thecium 75r. tall ; parathecium 35r. thick B. pinnicola<br />
Ascospores over 16r. long<br />
Thecium 180-190~ tall, parathecium 90-6OP on sides, 120-20OP thick<br />
below . . . . . . . . . . . . B. inmdinata<br />
Thecium 130-140~ tall, 40-8OP on sides, 70-100~ thick below<br />
B. anisomera Vainio
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